"Together (the teeth) formed a sort of rosette that interlocked when the jaws were closed," he added, saying that they might have been used in "threatening displays" and for catching fish.
Martill and colleague David Unwin of the University of Leicester made the discovery after analyzing a fragmentary, yet toothy, fossil housed within the collections of the Natural History Museum, London.
The fossil was unearthed from the Cretaceous Cambridge Greensand of eastern England, revealing that the pterosaur lived around 100 million years ago during what is known as the Albian stage.
During that time, Cambridge was under the sea. But Martill said there might have been a low island to the south where London is now. The climate was tropical then. Based on other fossil finds, the region was teaming with life. Fish, ichthyosaurs, plesiosaurs, crocodiles, turtles, dinosaurs (including prehistoric birds), and different types of pterosaurs all lived in the area.
Unlike dinosaurs, which live on today through birds, pterosaurs have no modern day descendants. They were "a sort of cousin to dinosaurs," according to Martill, and they bit the earthly dust 65.5 million years ago, when the world's non-avian dinosaurs also went extinct.